IB Biology Topic 4.1

Which category of organisms is correctly described in this table?

• A

• B

• C

• D

What limits the length of a food chain in an ecosystem?

• The size of the individual organisms

• Competition between organisms

• The loss of energy between trophic levels

• Natural selection

Tags

NGSS.MS-LS2-3

What is the definition of species?

• I

• II

• III

• None of the above

Tags

NGSS.MS-LS4-2

The statement is about the role of some bacteria in ecosystems. What mode of nutrition is described?

• They are autotrophs

• They are consumers

• They are saprotrophs

• They are detritivores

Tags

NGSS.MS-LS2-3

The diagram represents a pyramid of energy. What level does the letter X represent?

• Light

• Primary consumers

• Abiotic environment

• Producers

Tags

NGSS.MS-LS2-3

What is the classification of an organism that is able to make organic compounds from inorganic nutrients?

• Autotroph

• Consumer

• Detritivore

• Saprotroph

Euglena is a unicellular organism that feeds on bacteria and uses CO₂ as a carbon source. Which described the nutrition of this organism?

• Autotrophic only

• Heterotrophic only

• Saprotrophic only

• Autotrophic and heterotrophic

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is lost between trophic levels and cannot be recycled?

• Heat

• Nitrogen

• Carbon compounds

• Biomass

Tags

NGSS.MS-LS2-3

What name is given to an organism that ingests dead organic matter?

• Autotroph

• Detritivore

• Herbivore

• Parasite

What series of ecological units is in the correct order of decreasing biomass?

• Ecosystem, population, community, individual

• Earth, ecosystem, population, individual

• Community, Earth, population, individual

• Earth, ecosystem, population, community